FeCo<sub>2</sub>S<sub>4</sub>/Ni foam: A Bimetallic Sulfide Electrocatalyst with Efficient and Robust Behavior
Jiayou Tao,
Shuhua Liu,
Yanmo Liao,
Hui Qiao,
Yu Liu,
Hui Chen,
Min Teng,
Yong Wei,
Sanjie Liu,
Zongyi Qiu,
Chang Li,
Xiang Qi
Affiliations
Jiayou Tao
Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, School of Physics and Electrical Sciences, Hunan Institute of Science and Technology, Yueyang 414006, China
Shuhua Liu
School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China
Yanmo Liao
Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, School of Physics and Electrical Sciences, Hunan Institute of Science and Technology, Yueyang 414006, China
Hui Qiao
School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China
Yu Liu
Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, School of Physics and Electrical Sciences, Hunan Institute of Science and Technology, Yueyang 414006, China
Hui Chen
Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, School of Physics and Electrical Sciences, Hunan Institute of Science and Technology, Yueyang 414006, China
Min Teng
Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, School of Physics and Electrical Sciences, Hunan Institute of Science and Technology, Yueyang 414006, China
Yong Wei
Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, School of Physics and Electrical Sciences, Hunan Institute of Science and Technology, Yueyang 414006, China
Sanjie Liu
Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, School of Physics and Electrical Sciences, Hunan Institute of Science and Technology, Yueyang 414006, China
Zongyi Qiu
ZhongKe (Guangdong) Refinery & Petrochemical Company Limited, Zhanjiang 524076, China
Chang Li
Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, School of Physics and Electrical Sciences, Hunan Institute of Science and Technology, Yueyang 414006, China
Xiang Qi
School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China
The development of effective, feasible, stable, and inexpensive electrocatalysts has been a great challenge in the field of overall water splitting (WS). Herein, a bifunctional electrocatalyst (BF ECS), FeCo2S4 nanowire (FCS NWs/Ni)/nickel (Ni) foam, with superior HER/OER activity and stability was designed and fabricated using a hydrothermal method. In addition, this efficient method can be used for the synthesis of other bimetallic MCo2S4 sulfides (M = Cu, Zn, Mn, etc.). Electrochemical experiments showed the as-synthesized FCS NWs/Ni exhibited overpotentials of 350.5, 203.7, 115.97, and 62.6 mV (0.05, 0.1, 0.2, and 1 M KOH) at the current density of −10 mA cm−2 for HER, including small overpotentials of 1.51, 1.36, 1.24, and 1.11 V (10 mA cm−2) in a 0.05, 0.1, 0.2, and 1 M KOH solution for OER. The FCS NWs/Ni has a splendid electrocatalytic performance which is related to the synergistic effect of cobalt, iron, and sulfur. Specifically, it has excellent electrical conductivity, a higher specific capacity, and a rich redox state of iron, cobalt, and sulfur elements. The results demonstrate a promising method for the design and fabrication of metal BF ECS for overall water splitting.
